package jdbc;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

/**
 * 完成用户登录功能
 * 要求输入用户名和密码
 * 如果与user表中数据一致，则登录成功,否则登录失败
 */
public class LoginDemo {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入用户名:");
        String username = scan.nextLine();
        System.out.println("请输入密码:");
        String password = scan.nextLine();
        try (Connection conn = DBUtil.getConnection()){
            Statement statement = conn.createStatement();
            String sql = "SELECT username, password "+
                         "FROM user "+
                         "WHERE username='"+username+"' AND password='"+password+"'";
            ResultSet rs = statement.executeQuery(sql);
            if (rs.next()){
                System.out.println("登陆成功");
            }else{
                System.out.println("登录失败");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }
}
